22825421 has 4 divisors (see below), whose sum is σ = 23138172. Its totient is φ = 22512672.

The previous prime is 22825399. The next prime is 22825423. The reversal of 22825421 is 12452822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19624900 + 3200521 = 4430^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 22825421 - 2¹⁴ = 22809037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22825423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156266 + ... + 156411.

It is an arithmetic number, because the mean of its divisors is an integer number (5784543).

Almost surely, 2^22825421 is an apocalyptic number.

It is an amenable number.

22825421 is a deficient number, since it is larger than the sum of its proper divisors (312751).

22825421 is an equidigital number, since it uses as much as digits as its factorization.

22825421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312750.

The product of its digits is 2560, while the sum is 26.

The square root of 22825421 is about 4777.5957342580. The cubic root of 22825421 is about 283.6653343108.

The spelling of 22825421 in words is "twenty-two million, eight hundred twenty-five thousand, four hundred twenty-one".